my boyfriend had the same problem for ages. he just got told he has a low blood pressure and low sugar levels. i would say go to your GP. its prop nothing to worry about maybe just a phase?
Hollis.......sandy might well be spot on, but you need to see your GP who would take a social history and provide a few blood tests.eg thyroid etc if need be.
Holli - overwork, troubles, eating too late at night, fizzy drinks, going to bed too early... al keep me awake.
I can usually sleep any time (I could now) so if I can't sleep I know I'm in trouble. Can you read in bed? I find that a couple of chapters, then leaving the radio on, usually results in getting sleepy.
In the day time - bananas perk me up, and Lucozade.
you have my sympathy Holli...if you haven't tried them it is worth having a go with nytol... or herb tea with one that contains valerian,and passiflora and hops about an hour before bed time...make it strong with a couple of the teabags. write down anything that is worrying you before you go to bed and leave the pad downstairs telling yourself you will deal with it in the morning...make sure your room is dark enough and quiet with no distractions, and don't worry about not sleeping just try to settle... oh and get some exercise during the day (every day) that will increase your energy levels if you do and help you sleep.